Spring cloud config example - unable to find entry point

[itzikiusa]

Hi, tried to run the example of 'cloud' from samples module getting the following error(graal 2.2.0 install) both when running from the IDE and both from build script:

Error: Main entry point class 'com.example.webflux.WebfluxApplication' not found.`

[aclement]

I just tried it:

-> native-image --version
GraalVM Version 20.2.0 (Java Version 1.8.0_262)
/home/andy/gits/spring-graalvm-native/spring-graalvm-native-samples/cloud [git:master:635baf0:]         
-> ./build.sh            
=== Building cloud sample ===
Packaging cloud with Maven
Unpacking cloud-0.0.1-SNAPSHOT.jar
Compiling cloud with GraalVM Version 20.2.0 (Java Version 1.8.0_262)
SUCCESS
Testing executable 'cloud'
SUCCESS
Build memory: 7.76GB
Image build time: 79.3s
RSS memory: 114.1M
Image size: 63.4M
Startup time: 0.141 (JVM running for 0.143)

which OS are you on? Are you building it build.sh when you say scripts?

Does the base project build fine for you? mvn clean package since that produces the built artifact (with the application class in) that the scripts will dismantle. mvn spring-boot:build-image also worked for me to create a docker image.

[itzikiusa]

Ubuntu 16.4 Graalvm 20.2.0 Java 8

[sdeleuze]

@itzikiusa Could you please provide the output of native-image --version, build.sh and mvn spring-boot:build-image?

[itzikiusa]

@sdeleuze @aclement just cloned the repo and ran the build.sh

=== Building cloud sample ===
Packaging cloud with Maven
./compile.sh: line 15: mvn: command not found
Unpacking cloud-0.0.1-SNAPSHOT.jar
cp: cannot stat 'META-INF': No such file or directory
find: 'BOOT-INF/lib': No such file or directory
Compiling cloud with GraalVM Version 20.2.0 (Java Version 1.8.0_262)
[cloud:6456]    classlist:   5,761.34 ms,  1.09 GB
Error: Main entry point class 'com.example.webflux.WebfluxApplication' not found.
Error: Use -H:+ReportExceptionStackTraces to print stacktrace of underlying exception
Error: Image build request failed with exit status 1

real    0m7.024s
user    0m22.572s
sys 0m1.892s
FAILURE: an error occurred when compiling the native-image.`

[itzikiusa]

this is when trying to run via mvn build

[INFO] Building image 'docker.io/library/cloud:0.0.1-SNAPSHOT'
[INFO]
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 3%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 6%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 8%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 9%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 12%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 20%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 29%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 37%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 44%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 48%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 51%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 59%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 65%
[INFO]  > Pulling builder image 'gcr.io/paketo-buildpacks/builder:base-platform-api-0.3' 100%
[INFO]  > Pulled builder image 'gcr.io/paketo-buildpacks/builder@sha256:48382899b4c5b4d8ba143dc5b8c9f64d0c89814a2bff1cd79c30da1534120ee6'
[INFO]  > Pulling run image 'docker.io/paketobuildpacks/run:base-cnb' 0%
[INFO]  > Pulling run image 'docker.io/paketobuildpacks/run:base-cnb' 38%
[INFO]  > Pulling run image 'docker.io/paketobuildpacks/run:base-cnb' 100%
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  50.265 s
[INFO] Finished at: 2020-09-18T18:46:37Z
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.springframework.boot:spring-boot-maven-plugin:2.4.0-M3:build-image (default-cli) on project cloud: Execution default-cli of goal org.springframework.boot:spring-boot-maven-plugin:2.4.0-M3:build-image failed: No digest found -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException`

[sdeleuze]

I tested locally and it works.

For build-image I see a strange Execution default-cli of goal org.springframework.boot:spring-boot-maven-plugin:2.4.0-M3:build-image failed: No digest found -> [Help 1] error.

For the script, please install Maven locally to avoid mvn: command not found or modify the script to use ./mvnw instead of mvn and share the output.

[itzikiusa]

just ran it again seems to work now, cannot reproduce it :(